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在日本茨城县,以沿岸浅海域虾类(鹰爪虾、戴氏赤虾)为捕捞对象的底拖网(虾板拖网和自家用饵料板拖网)渔业是准许的。该渔业主要在秋季至春季10-30米水深海域进行作业,但同期同海域又是鲆、鲽类等幼鱼生息的海区,使用相同的渔法兼捕幼鱼正成为一个大问题.特别是在茨城县,为了增殖牙鲆,从1995年起,新栽培渔业中心计划放流200万尾牙鲆幼鱼。但由于底拖网的捕捞,担心大量放流幼鱼也许被兼捕。另外,
In Ibaraki prefecture, Japan, bottom trawls (shrimp trawl and domestic bait trawls) fisheries that are targeted for shrimp (claw shrimp, Takayama shrimp) in shallow coastal shores are permitted. The fishery operates mainly in waters 10-30 meters deep between autumn and spring, but using the same method for juvenile fish and juveniles is becoming a big problem in the same maritime area where juveniles such as fledglings and slugs live. In Ibaraki Prefecture, in order to grow Japanese flounder, since 1995, the newly planted fisheries center plans to release 2 million flounder juveniles. However, due to bottom trawling, there is concern that large numbers of lethal juveniles may be bycatch. In addition,